The Gospel reading for Trinity Sunday, Year B is set below.
Among other things it reminds of how the story of we who are baptised into Christ, in a very real way, began on the day of the Ascension, with the Great Commission to the disciples.
The eleven disciples set out for Galilee, to the mountain where Jesus had arranged to meet them. When they saw him they fell down before him, though some hesitated. Jesus came up and spoke to them. He said, ‘All authority in heaven and on earth has been given to me. Go, therefore, make disciples of all the nations; baptise them in the name of the Father and of the Son and of the Holy Spirit, and teach them to observe all the commands I gave you. And know that I am with you always; yes, to the end of time.’
In our baptism we are incorporated into the Body of Christ; we become part of how God is, not by nature but as fruit of love.
In that incorporation the gift of salvation is offered to us and we have the opportunity of sharing that gift with others. The Lord is with us so we might be with and for others.
Font in Abbey of St Victor, Marseille. (c) 2014, Allen Morris.